Woodward 8440-1878
Woodward 8440-1878 - Image 2

Woodward 8440-1878

Product Introduction
The Woodward 8440-1878 is a critical power supply or control module designed for Woodward’s modular control platforms. It provides the stable, regulated DC voltages required by sensitive digital logic cards, I/O modules, and actuator drivers within a control rack.

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Description

Woodward 8440-1878

Technical Specifications

  • Product Type: Power Supply Unit / Control Module.
  • Input Voltage: Wide-range AC or DC input (e.g., 85-264 VAC or 100-300 VDC).
  • Output Voltage: Regulated 24 VDC, 12 VDC, and 5 VDC rails.
  • Protection: Integrated over-voltage, over-current, and short-circuit protection.

Functional Features

  • Stable Power Delivery: Provides clean, ripple-free DC power to prevent noise in analog control circuits.
  • Redundancy Capable: Designed to operate in parallel with identical units for N+1 power redundancy.
  • Status Monitoring: Features a “Power Good” relay output and front-panel LED to indicate healthy operation.
  • High Efficiency: Switching power topology minimizes heat generation and energy waste.

Application Scenarios
Integral component in MicroNet, 505E, and 2301 control panels, ensuring uninterrupted power to all electronic modules.

Performance Parameters

  • Load Regulation: Excellent voltage stability (<0.5%) from no-load to full-load.
  • Hold-Up Time: Sufficient energy storage to ride through brief power interruptions.

Material Composition
Industrial-grade capacitors, transformers, and switching components. Metal enclosure acting as a heat sink. Conformal-coated PCB for environmental protection.

Structural Characteristics
Plug-in module for the control rack or standalone DIN-rail mount. Front panel features voltage test points, status LEDs, and adjustment potentiometers (if applicable).

Working Principle
Rectifies and filters the incoming AC/DC power, then uses high-frequency switching to step down the voltage. A feedback loop continuously adjusts the switching duty cycle to maintain a constant output voltage despite input fluctuations or load changes.

Installation Requirements
Ensure adequate airflow across the module for cooling. Connect input power through a properly rated circuit breaker. Verify output voltage before connecting load modules.

Usage Precautions

  • Never hot-swap the module unless the system explicitly supports it.
  • Check input fuses if the unit fails to power up.
  • Replace immediately if the “Power Good” signal is lost or output voltage drifts out of specification.

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